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Jan. 1, 1929. 1,697,523.

` G. H. DAWSON REENFORCED INDEX CARD Filed Jan. 27, 1928 7` 62024 a Hwa-0:70? L i0? www# W07 l.

` Patented Jan. 1, 1929.

UNITED` STATES PATENT OFFICE.

GEORGE H. DAWSON, BOSTON, MASSACHUSETTS, ASSIGNOR TO SERVICE BUREAU, INC., OF CAMBRIDGE, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

REnNrononD INDEX GARD.

Application led January 2'?, 1928.

This invention relates to guide cards provided With projection tabs, such as are commonly employed in a vertical filing system to separate into indexed groups the card, folders or other ind x material constituting the filing system. The principal object of the invention is to provide an improved metal reenforcement for the guide card, so constructed and arranged that the card and its tab are adequately strengthened and protected against bending stresses and destructive handling Without, however, the formation of a straight line at the bottom of the reenforcing member upon which the card might tend to fold and crack.

A preferred embodiment of the invention is illustrated in the accompanying drawings, in Which:

Fig'. l is a face view of a guide card equipped with the improved reenforcement;

Fig. 2 is a rear view thereof; and

Fig. 3 is an enlarged section on the line 3 8 of Fig. l.

The card body Il and its integral projecting tab 5 may be made of any suitably stiff sheet material, such as cardboard, fiber board or the like, and may be of any desired size or shape. The tab is adapted to display index characters which may be inscribed directly upon the face of the tab or may appear upon a separate slip which is pasted or otherwise attached to the tab, in order to identify the subject matter behind the particular Guide card.

The front face of the tab and the index characters may be protected from moisture and soilage by an adhesively secured strip 6 of transparent material, such as Celluloid, or by a coating of collodion, shellac or other transparent and hard-drying fluid. The sheet material or coating constituting the protective covering preferably covers the surface of the tab and has its lower edge 7 extending parallel with and adjacent to the upper edge 8 of the card body.

A metal reenforcing plate 9 is applied fiat- Wise upon the rear face of the card and tab and is preferably secured at its upper edge by means of a top iiange l() which is rolled or crimped over the top and shoulders of the card tab and over the protective covering.

Serial No. 249,993.

The bottom of the plate 9 may be fastened to the card body by eyelets l1, or other suit able means, In order to avoid the formation of a predetermined line of fold at the bottom of the plate, upon which the card might bend or crack during handling, the bottom margin of the plate is centrally recessed at 12 and the bottom corners 13 are preferably rounded to provide a curvilinear edge.

will be noted that the rolled iange completely encloses the top edges and shoulders of the card tab 5 and Celluloid covering 6, and extends downwardly to hold the bottom corners of the Celluloid tight-ly against the card surface. The bottom edge 7 of the Celluloid is accordingly secured fiativise against the card so that it Will not be separated therefrom by accidental contacts, and whereby it prevents papers or other ob jects from catching under said edge.

I claim:

l. an index card havin@ an integral proj ecting tab provided on its front face With a protective covering of transparent material, and having a reenforcing plate applied to the rear face of the card and tab, said plate having a top flange rolled over the upper edge and shoulders of the tab and its covcring, and fasteners near the bottom corners of the plate, the bottom margin of the plate having a deep, curved, central recess to avoid a predetermined lino of fold.

2. An index card having an integral projecting tab provided on its front face With a protective covering of transparent sheet material, and having a reenforcing plate applied to the rear face of the card and tab, said plate having a top flange rolled over t-he upper edge and shoulders of the tab and its covering', and fasteners near the bottom corners of the plate, the bottom margin of the plate having a deep, curved, central recess to avoid a predetermined line of fold.

3. 15in index guide comprising a card having an integral tab projecting above its upper margin adapted to display index characters, a protective covering of transparent sheet material applied on the front face of the tab, said covering having its upper edge and shoulders substantially coinciding' With the top edge and shoulders oi the card tab and having its bottom edge terminating acljacent anol parallel to the said upper mai-gin of the card, and reenfoicingj plate secured atwise upon the rear surface of the cai'd and tab, said plate having a top liange rolled over the upper edge and shoulders of the card tab and its covering, the ends of sainl flange enclosing the bottoni corners of said protective covering. 10

Signed by me at Boston, Massachusetts, this twenty-third day of January, 1928.

GEORGE I-I. DAWSON. 

